Recently I ran into a project where 3 teams are working in Revit: RST, RAC and MEP. You would think that they should not have any problem with getting the models lined up in Navisworks.We wanted to do clash detection in Navisworks so we exported the models to nwc. Somehow somewhere something must have gone wrong. In Revit it looked fine but not in Navisworks.(Navisworks 2013 will be able to read rvt files and it's linked files!!!) I have already written tips for exchanging information between Revit and Civil 3D on my civil2revit.blogspot.com I'll add a workflow I like to use that so far seems to give the best results and gives you the most control!We have a dwg of a site that has been drawn accordingly to a coordinate system. Since I am dutch we use the rd-system. Revit has a 30 km boundary around it's origin where you have to put your model. This means you can't model anything in Revit if it's located anywhere in The Netherlands. Basically what you will be doing is moving the dwg with the location under the revit origin. From experience I know that Revit 2012 has some rounding issues which I haven't been able to pinpoint yet. For safety reasons I have a trick to bypass that issue.Steps: Autocad

open the dwg from the site

choose a easily recognizable point as a project basepoint

use the ID command in autocad to find it's xyz values

create a symbol, I prefere a circle with a cross, and place that ontop of the choosen point

move the symbol to the nearest round value (important because of rounding in Revit)

This location is going to be the project base point

copy the ID value of this point and paste it into notepath

Save the drawing

Steps: notepath

Be aware most coordinate system are in meters and Revit models tend to be build in mm.

This means you need to move the comma 3 spots to the right

Steps: Revit

Open your level that has a Z value of zero

Goto visibility and graphics

Goto the site category, expand and turn on survey point and basepoint

Select the project base point (the circle)

Copy the X value from notepath into the E/W

Copy the Y value from notepath into the N/S

Do not paste these values into your instance property window, you will get an error. If you paste them into the on screen thing it will accept those values.

Be aware you survey point will move away from your project base point. The project base point is still located on the Revit origin!

If you take a look at your survey point you should see that it's values are all zero. Your autocad origin (0,0) will be lined up with your Revit survey point.

Steps: Revit

Goto Insert --> link CAD

Choose the dwg with the site information

Set Import units to the meters (assuming it has been drawn in meters)

Set positioning to by shared coordinates

press okay and you will get the next message

This is actually good because this should import the dwg origin on top of your survey point. This should also have the effect that the project base point marker you created in Autocad lands ontop of your project base point set in Revit.

Steps: Revit

Goto visibility and graphics and turn of the survey point this will enable you to use zoom extends again

draw two model lines in this view on top of Autocad lines

Save the revit file and make an export the nwc

Make sure that within the Navisworks export settings you set the units to feet... (yes really!!!)

Steps: Navisworks

Attach the dwg (the one you linked earlier into Revit)

Attach the nwc from Revit

take a look at the lines you drew in Revit and whether they line up with the Autocad lines. If they do you are good to go!

if you select the revit nwc file and right click it and go to units and transform you should get a dialog box with coordinates that are the same as the coordinates of the project base point in Navisworks. (nice to check)

If they don't check the steps and all the file and unit settings and adjust them accordingly where needed. If you still have problems contact me.

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The best recipy for apple pie involves using decent apples. Any naughty or rotten apples are not recommended. Feel free to add other fruits and nuts to your apple pie. I have some good results with adding some booze as well but please don't distribute those apple pies to children. By now you should really stop reading these laimers. Ingredients

for the pastry

250g plain flour, plus extra for dusting

50g icing sugar

sea salt

1 lemon

125g cold butter, plus extra for greasing

1 large egg, preferably free-range or organic

a splash of milk

for the filling

1 large Bramley cooking apple

4 eating apples (try Cox�s or Braeburn)

3 tablespoons Demerara or muscovado sugar

teaspoon ground ginger

a handful of sultanas or raisins

a lemon

To make your pastry

Preheat the oven to 180�C/350�F/gas 4

You can make your pastry like this (by hand), or pulse it in a food processor

From a height, sieve your flour into a large mixing bowl

To make your pastry

Add the sugar, a pinch of salt, and finely grate over the zest of the lemon

Cut the butter into cubes, then add to the bowl

Use your fingertips to gently work the butter into the flour and sugar until the mixture resembles breadcrumbs

To make your pastry

Crack the egg into the bowl with a tiny drop of milk and gently mix with your hands until the dough comes together

Wrap it in clingfilm and pop in the fridge to rest while you make the filling

To make your filling

Use a speed peeler to peel all of your apples

Cut the Bramley apple into sixths and the eating apples into eighths, get rid of the cores

Add all the apple pieces to a small pan with the muscovado sugar, ginger and sultanas or raisins

To make your filling

Finely grate over the zest of half a lemon, then squeeze in a little juice

Toss to mix then put the pan on a medium low heat

Simmer gently for 5 minutes or until the apples are just tender

Remove from the heat and allow to cool completely

To make and cook your pie

Dust a clean work surface and rolling pin with flour

Divide your pastry dough into two and roll out one half until 1/2 cm thick

Carefully roll your pastry around the rolling pin, then unroll it carefully over a 20cm pie dish

To make and cook your pie

Ease the pastry into the dish, making sure you push it into all the sides

Don't worry if it tears or breaks just patch it up it will look nice and rustic

Pack the apple mix tightly into the pie dish

To make and cook your pie

Separate your remaining egg and beat the yolk with a splash of milk and brush over the pastry rim

Roll out the other piece of dough until �cm thick

Carefully roll the pastry around the rolling pin, then unroll it over the top of the pie

To make and cook your pie

Fold the excess pastry back in then pinch and crimp the edges together using your finger and thumb

Brush the top of the pie with more egg wash, then using a small sharp knife, make a couple of small incisions in the centre of the pie to let steam escape as it cooks

To make and cook your pie

Bake in the hot oven for 40 to 45 minutes until golden and firm to the touch